import tkinter as tk


window = tk.Tk()
window.title('my window')
window.geometry('200x200')



l = tk.Label(window, bg='green', width=20, text='empty')
l.pack()


def print_selection():
    if(var1.get() == 1) &(var2.get() == 0):
        l.config(text='I love only python')

    elif(var1.get()==0)& (var2.get() == 1):
        l.config(text='I love only C++')

    elif(var1.get()==0) & (var2.get() == 0):
        l.config(text='I do not love either')

    else:
        l.config(text='I love both')
   

var1 = tk.IntVar()
var2 = tk.IntVar()

c1 = tk.Checkbutton(window, text='python',
                    variable=var1, onvalue=1,
                    offvalue=0, command=print_selection)

c2 = tk.Checkbutton(window, text='C++',
                    variable=var2, onvalue=1,
                    offvalue=0,command=print_selection)
c1.pack()
c2.pack()


window.mainloop()
